Device for attaching members



Jan. 18, 1938. F. c. SPENCER .DEVICE FOR ATTACHING MEMBERS Filed Nov. 18, 1956 Patented Jan. 18, 1938 UNITED STATES PATENT OFFICE DEVICE FOR ATTAOHING MEMBERS Application November 18, 1936, Serial No. 111,382

6 Claims.

This invention relates to devices for attaching members, and more particularly to a device for locking tubular flyer arms to driving heads of strand twisting machines of the general type dis- .5- closed in the H. H. C. Grondahl Patent 1,263,405

of April 23, 1918.

Objects of this invention are to provide an ehicient and practical device for attaching to its support a tubular machine element subjected to great lo centrifugal stresses during motion.

In accordance with the above objects, the invention in one embodiment thereof as applied to the attaching of tubular flyer arms to driving heads of strand twisting machines of the aforementioned type, contemplates a device wherein a supporting bracket fixed to the driving head is formed with a recess to receive half the cross section of the tubular arm and a clamping plate also recessed to receive the other half of the arm (j, are provided with aligned similar channels in their opposed recessed faces extending at right angles to and intersecting the recesses. Entered in the end of the arm is a hollow block having diametrically opposed grooves or peripheral 9;, channels aligned with the channels in the bracket and clamping plate, the aligned channels receiving locking pins. In locking the parts, the hollow block is fitted in the end of the tubular arm which is then laid in the bracket recess with a locking pin in its channel. Thereafter the recessed clamping plate with a locking pin in its channel is laid over the arm and fastening screws are driven home which serve to defiect opposite wall portions of the tubular arm into the channels of gr, the block by the interposed locking pins, thus securely locking the arm to its supporting bracket and plate.

Other objects and advantages of this invention will more fully appear from the following detailed description, taken in connection with the accompanying drawing, wherein Fig. 1 is a central vertical section of an attaching device embodying the features of this invention, the parts being shown in locked relation;

Fig. 2 is a similar `view showing the parts in position ready to be locked together; Y

Fig. 3 is a fragmentary sectional view taken on the line 3-3 of Fig. 1, and

Fig. 4 is a fragmentary elevational view of Fig.

5o l looking toward the right and downwardly on a line perpendicular to the face of the bracket.

In the drawing the invention is shown as applicable to a strand twisting machine such as is used in the manufacture of telephone cable. Since the twisting machine is of a well-known type, such as lol. 287-20) is disclosed in the above referred to patent, and forms no part of this invention, only such parts thereof are illustrated which are necessary to a full understanding of the present application of the invention. Referring to the drawing, a ro- 5 tatable bracket or driving head is indicated at I0, which carries a plurality of tubular yoke or flyer arms II, the head and arms being shown fragmentarily. Since the driving head Ill and the flyer arms II carried thereby are rotated at a lo high rate of speed in the operation of strand twisting, the arms will consequently be subjected to great centrifugal stresses tending to pull away from their points of support on the driving head.

The flyer arms I I, only one of which isy shown, are 35' securely locked to the driving head It by an attaching device comprising a split bracket, indicated at I2 and I3, the part I3 acting as a clamping plate in the final locking of the elements together. Each bracket part is provided with a recess I4 for receiving half the cross section of the tubular iiyer arm II, which in the present instance, as shown in Figs. 3 and 4, is larger in cross section in one direction than the other. The bracket part I2 is formed with an arm which is I, attached to the head i by screws II and the 20 clamping plate I3 is secured to the part I2 by screws I8.

Within the end of the tubular liyer arm II, which is locked to the bracket part I2, is fitted a hollow block or plug I9 having a slight taper from its upper end to its lower end, as viewed in Figs. 1, 2 and 4, the lower end having a snug fit in the arm, and the upper end is only enough larger that it will have a tight lit when driven into the tubur lar member. Preferably the lower end of the 3" block I9 is bifurcated as shown (Fig. 4). The member I9 is provided with a strand passage 2i] suitably shaped throughout its length to permit the twisted strands to pass therethrough without deleterious friction. Formed in the block I9 are diametrically opposed peripheral channels or grooves 2|, of arcuate shaped contour, which extend transversely thereof, and at right angles to the bracket recesses I4. The bracket parts I2 and I3 are provided upon their inner faces with channels 24 of circular contour and aligned with the channels 2| of the block IS, the channels 24 intersecting the recesses I4 of the bracket parts. The channels provide open grooves in the recesses 50 and terminate in drilled holes extending to the exterior of the bracket parts I2 and I3. Tightly fitted in each of the channels 24 is a locking key or pin 25 which projects for substantially onehalf of its length and cross-sectional area into the recess I4, as clearly shown in Figs'. 1 and 2, due to the channel 24 intersecting the recess I4. Referring to Fig. 2, it will be apparent that upon the clamping plate I 3 of the bracket being drawn into position against the bracket part I2 by tightening the screws I8 that the locking pins 25 will deect inwardly opposite portions 26 of the wall of the tubular flyer arm, II, theY deflected portions being pressed into thechannels 2| of the block I9 which serves as a die or anvil to shape the wall portions about the locking pins.

To lock the tubular flyer arm II to the split bracket, the hollow tapered block I9may be rst fitted in the end of the arm With the channels 2I predeterminedly positioned relative thereto and y the arm is then positioned in the recess I4 of the bracket part I2 (Fig. 2), the channel 24 thereof being aligned with the channel 2I of the block I9 which carries a locking pin 25. The recessed clamping plate I3 carrying a locking pin 25 in its channel 24 is then laid over the arm II and the fastening screws I8 are driven home. As -the screws I8 are threaded intoV the bracket part I2 the locking pins 25 are pressed against the opposite wall portions 25 of the arm yII which portions are deformed and deected into the channels 2I of they block I9 and when fully deflected, as shown in Fig. 1, serve tosecurely lock the arm II to its supporting split bracket.y It will be obvious in the particular application of the invention that the deected VWall portions 26 of the arm II which are locked to the split bracket and extend at right angles to the direction of the clamping action of the plate I3, which clamps the arm between the bracket parts I2 and I3, will provide a maximum resistance to centrifugal Y stresses'set up tending to pull the arm away from the bracket.

Although the invention herein described and illustrated is particularly well adapted for= use in strand twisting machines, it will be understood that the invention is capable of many other modifications and applications and is to be limited only by the scope of the appended claims.

What is claimed is: Y

1. A device for attaching-a tube to supporting members, comprising means having spaced peripheral transverse channels tted within the tube, the members having recesses cooperating to receive the tube therein andtransverse channels intersecting the recesses and aligned with the channels in said means, the channels in the members having locking means entered therein abutting the periphery of the tube, and means for clamping the members together to cause said locking means to deform the Wall of the tube into the channels `cf said means to rmly attach the tube to the members.

2. A device for attaching a tube to supporting members, comprising means'having diametrically opposite peripheral transverse channels fitted within the tube, the members having recesses cooperating to receive the tubeY therein andtransverse channels intersecting the recesses and Aaligned with the channels in said means, the

, to receive the tube therein and transverse channels intersecting the recesses and aligned with the channels in said plug, locking pins in the channels in the support parts, said pins abutting the periphery f the tube, and means for clamping the support parts together to cause said locking pins to deiiect the wall of the tube into the channels of said plug to iirmly lock the tube to the support.

4. A device for locking flyer arms of oblong tubular cross-section to a driving two part support, comprising a hollow wedge fitting the inner periphery of the tubular flyer arm, said wedge having diametrically opposed transverse channels formed in its longer outer peripheral sides, the support parts having recesses cooperating to receive the flyer arm therein and transverse channels intersecting the recesses and aligned with the channels in saidf wedge, locking pins tted in the channels of the support parts. and abutting the periphery of the flyer arm, and means for drawing and retaining the support parts together to cause said locking pins to deect the wall of the tubular flyer arm into. the

channels of saidwedge to firmly lock. the tubular I flyer arm to the driving support.

; A device for attaching a hollow member toI supporting members, comprising means having a. transverse channel tted within the hollow mem,- ber, the supporting members having recesses cooperating to receive the hollow member therein, one of the supporting members having a transverse channel intersecting the recess ther-eo! opposite the channel'in said means, the channelin the supporting member having locking means entered therein, and means for clamping the supporting members together to cause said' locking means to deform the wall of the hollow member into the channel of said means tted in the hollow member to rmly attach the latter member to the supporting members.

6. A device for locking a. hollow member to a two part support, comprising a plug having a transverseV channel iitted within the member; the support parts havingv recesses cooperating to receive the member therein, one of the support parts having a transverse channel intersecting the recessthereof opposite the channel in said plug, a locking pin in the channeliof the support part, and means-for clampingA the support parts together to 'cause said pin to, deflect the wall of the member into the channel voifsaid plug to firmly lock the member to the support.,

FRANK C. SPENCER. 

